Because an hour includes 60 minutes (and not one hundred minutes) adding time takes a bit of time.

Hours and minutes are two different units that measure time. However, minutes are not a decimal number of hours,
i.e. half an hour (0.5 of an hour) is not 50 minutes, it’s 30 minutes… making time calculation a brain teaser.

Adding time with a conventional calculator requires you to first convert your minutes into a decimal number, by dividing the minutes into 60.
Our calculator for time adds your hours and minutes in no time. Print or email your Time Calculation to double check for accuracy.

Time Calculator - Disclaimer
Our time calculator is designed to provide you general estimates. It should not be relied upon to calculate financial data.
CalculateHours.com does not give any warranty or assurance as to the quality or accuracy of our Time Calculator.